Sugar decolorizing quaternary ammonium acrylamide resins

• US 4,082,564 A
• Filed: 03/23/1977
• Issued: 04/04/1978
• Est. Priority Date: 09/09/1975
• Status: Expired due to Term

• Current Assignee: Rohm and Haas Company (Dow, Inc.)
• Original Assignee: Rohm and Haas Company (Dow, Inc.)
• Inventors: Fries, William, Napierski, Silvia
• Primary Examiner(s): Schofer, Joseph L.
• Assistant Examiner(s): Kulkosky, Peter F.
• Application Number:
  US05/780,618
• Time in Patent Office: 377 Days
• Field of Search: 260/2.1 E, 127/46 A, 526/16, 526/49, 526/42
• US Class Current: 127/46.2
• CPC Class Codes: B01J 41/14 obtained by reactions only involving unsaturated carbon-to-carbon bonds
• CPC Class Codes: C08F 220/56 Acrylamide; Methacrylamide
• CPC Class Codes: C08F 8/44 Preparation of metal salts or ammonium salts
• CPC Class Codes: C13B 20/146 using only anionic ion-exchange material C13B20/148 takes precedence

Abstract

Crosslinked macroreticular and gel-type quaternary ammonium acrylamide anion exchange resins which possess a potential for hydrophobic bonding and thereby display a high affinity for slightly ionized or unionized refractory color bodies as well as for the more easily removed color bodies in aqueous sugar solutions are provided.

Claims

1. A process for decolorizing aqueous sugar solutions which comprises contacting the solution with a crosslinked, macroreticular, quaternary ammonium acrylamide resin which comprises the product of a compound of the formula RX with a crosslinked, macroreticular tertiary amine, acrylamide precursor resin which comprises a copolymer of 0.1%-50% by weight of a polyethylenically unsaturated monomer and 50%-99.9% by weight of a monoethylenically unsaturated aliphatic ester of acrylic acid which has been aminolyzed with a polyamine, said resin comprising units having the chemical formula:

##STR9## wherein R is a substituted or unsubstituted hydrocarbyl functional group containing 5-22 carbon atoms and X is an anion, either alone or in series combination.

2. The process of claim 1 wherein the crosslinked, macroreticular, tertiary amine precursor resin comprises a copolymer of about 8% by weight of divinyl benzene, about 2% by weight of diethylene glycol divinyl ether, and about 90% by weight of methyl acrylate which has been aminolyzed with N,N-dimethylaminopropylamine.

3. The process of claim 1 wherein R is selected from the group which comprises substituted or unsubstituted (a) alkyl, (b) aralkyl, (c) aryl, and (d) alkaryl functional groups which contain 5 - 22 carbon atoms, is linear or branched, is saturated or unsaturated or a combination of the two, and, if substituted, contains 1 - 3 alkoxy, acyl, acyloxy or hydroxy groups and wherein X is an anion selected from the group which comprises hydroxide, halide, alkyl sulfate, bisulfate, and alkyl and aryl sulfonate anions.

4. The process of claim 1 wherein R is a substituted or unsubstituted (a) alkyl, or (b) aralkyl functional group which contains 5 - 18 carbon atoms, is linear or branched, is saturated or unsaturated or a combination of the two, and, if substituted, contains 1 - 3 alkoxy, acyl, acyloxy, or hydroxy groups, and wherein X is preferably halide such as chloride or bromide.

5. A process for decolorizing aqueous sugar solutions which comprises contacting the solution with a crosslinked, gel-type, quaternary ammonium acrylamide resin which comprises the product of a compound of the formula RX with a crosslinking, gel-type, tertiary amine, acrylamide precursor resin which comprises a copolymer of 0.1%-50% by weight of a polyethylenically unsaturated monomer and 50%-99.9% by weight of a monoethylenically unsaturated aliphatic ester of acrylic acid which has been aminolyzed with a polyamine, said resin comprising units having the chemical formula:

##STR10## wherein R is a substituted or unsubstituted hydrocarbyl functional group containing 5-22 carbon atoms and X is an anion, either alone or in series combination.

6. The process of claim 5 wherein the crosslinked, gel-type, tertiary amine precursor resin comprises a copolymer of about 3.7% by weight of divinyl benzene, about 0.5% by weight of diethylene glycol divinyl ether, and about 95.8% by weight of ether acrylate which has been aminolyzed with N,N-dimethylaminorpopylamine.

7. The process of claim 5 wherein R is selected from the group which comprises substituted or unsubstituted (a) alkyl, (b) aralkyl, (c) aryl, and (d) alkaryl functional groups which contains 5 - 22 carbon atoms, is linear or branched, is saturated or unsaturated or a combination of the two, and, if substituted, contains 1 - 3 alkoxy, acyl, acyloxy, or hydroxy groups, and wherein X is an anion selected from the group which comprises hydroxide, halide, alkyl sulfate, bisulfate, and alkyl and aryl sulfonate anions.

8. The process of claim 5 wherein R preferably is a substituted or unsubstituted (a) alkyl or (b) aralkyl functional group which contains 5 - 18 carbon atoms, is linear or branched, is saturated or unsaturated or a combination of the two, and, if substituted, contains 1 - 3 alkoxy, acyl, acyloxy, or hydroxy groups, and wherein X.sup.⊖

is preferably halide such as chloride or bromide.